8

如果 ViewModel 属性 =“无效” ,我希望我的 TextBox 具有红色背景。我必须改变什么才能使它起作用?

这个版本告诉我Background 没有限定类型名称

<TextBox
    Width="200"
    Text="{Binding FieldEmail, UpdateSourceTrigger=PropertyChanged}">
    <TextBox.Triggers>
        <DataTrigger Binding="{Binding FieldEmailValidationStatus}" Value="invalid">
            <Setter Property="TextBox.Background" Value="Tomato"/>
        </DataTrigger>
    </TextBox.Triggers>
</TextBox>

当我添加“文本框”时。它告诉我我必须有一个 EventTrigger

<TextBox
    Width="200"
    Text="{Binding FieldEmail, UpdateSourceTrigger=PropertyChanged}">
    <TextBox.Triggers>
        <DataTrigger Binding="{Binding FieldEmailValidationStatus}" Value="invalid">
            <Setter Property="Background" Value="Tomato"/>
        </DataTrigger>
    </TextBox.Triggers>
</TextBox>
4

1 回答 1

13

请允许我回答这个问题,我忘了把它全部包装成一种风格,然后它就很好用了:

<TextBox
    Width="200"
    Text="{Binding FieldEmail, UpdateSourceTrigger=PropertyChanged}">
    <TextBox.Style>
        <Style>
            <Style.Triggers>
                <DataTrigger Binding="{Binding FieldEmailValidationStatus}" Value="invalid">
                    <Setter Property="TextBox.Background" Value="Tomato"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBox.Style>
</TextBox>

或这个:

<Style x:Key="FieldEmailStyle" TargetType="TextBox">
    <Style.Triggers>
        <DataTrigger Binding="{Binding FieldEmailValidationStatus}" Value="invalid">
            <Setter Property="TextBox.Background" Value="Yellow"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding FieldEmailValidationStatus}" Value="valid">
            <Setter Property="TextBox.Background" Value="LightGreen"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

    <TextBox
        Width="200"
        Style="{StaticResource FieldEmailStyle}"
        Text="{Binding FieldEmail, UpdateSourceTrigger=PropertyChanged}">
    </TextBox>
于 2009-06-19T08:48:18.317 回答